Easy moist banana bread

1/4 c. butter or shortening
1/2 c. sugar
1 egg
2 c. flour
1/2 tsp. baking soda
1/2 tsp. baking powder
1/4 tsp. salt
3 tbsp. yogurt or buttermilk
3 ripe bananas, mashed

Mix shortening or butter to sugar and egg. Mix dry ingredients together. Mix yogurt and bananas. Add dry mixture and banana mixture to shortening mixture. Pour into greased 5 x 9 pan. Bake at 350 degrees for 1 hour.